drill steel

[′dril ‚stēl]

(metallurgy)

Steel with at least 0.85% carbon content made by the electric furnace process. Formerly known as crucible steel, when made by the crucible process.

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The component kit includes a Doofor hydraulic rock drill, a hydraulic valve block, a feed profile of anodized aluminum, carriage plate for the rock drill with sliders, drill steel guides, drill steel retainer, a durable feed chain, hydraulic feed motor and guarding for safety, as well as all other necessary casings.

Nordic Suppliers Make Smarter Machines: New ideas empower miners to develop custom solutions to site-specific needs

* Never manually thread the drill steel while the drill head rotates.

MSHA update

The high-pressure relief in the feed package valve should be set so that there is never enough thrust force to bend the drill steel. If the feed package is properly adjusted, the feed pressure that is observed in the system will not always be at the maximum setting.

Optimizing drilling parameters for improved bolting safety and performance: testing reveals that optimizing drilling parameters for feed pressure, feed rate, rotation speed and drill torque can have an impact on roof drill performance

NIOSH, Kennametal, and Corry Rubber research revealed that by isolating the chuck from the drill steel and the bit from the drill steel with a flexible, shock-absorbing material, the sound level is lowered considerably.

Room-and-pillar: eyeing the future: the latest in equipment, technology and consumables

One of the major improvements in the standard is the revised requirement to better protect operators and other personnel from the entanglement hazard caused by the rotating drill steel. Sandvik's solution to this requirement was to develop and install a safety cage around the feed beam.

Sandvik drill-safety standards apply globally

The drills were built with a flaw that could cause the drill steel to whip or break unless users install a free modification kit.

FLETCHER RECALLS ROOF DRILLS

An option is to use a normal hydraulic drill hammer with an automatic drill steel handling system.

Bored raises for development: raises could be used as vertical or near-vertical development openings

Tenders are invited for supply of items Integral drill steel 4.

Supply Of Items Integral Drill Steel 4. (108 Mm) Shank 7/8 (22 Mm) Hex Of Following Length & Bit Dia +(-) Limit Is 1% Mediumrock Drill Dc 122-r Superior Quality

(21.33 m) deep using 68-mm-diameter drill rod, commonly called drill steel. The bit can last 1,100 to 1,200 ft.

Cat top hammer drill for tough applications

"Drilling power is provided through our RD314 rock drill, ensuring not only improved drilling performance and precision, but also reduced drill steel consumption."

Mining machines for small spaces: E&MJ looks at recent developments in specialist machines for narrow-vein mining

A 6-inch airhole was quickly drilled to the 1 Left section near the face and someone was beating on the drill steel below, confirming that indeed someone was alive 240 ft below the pasture.

Quecreek Rescuers Save Nine Trapped Miners

Less than two years earlier, a 30-year-old contract driller at a shale quarry in Ulster County, New York, died in November 2012, as he attempted to thread a new drill steel manually when the drill head rotated and entangled him.